Rotary rock drill



Sept 11, 1923. 1,467,479 J. HENRITZI ROTARY ROCK DRILL Filed Jan. 17, 1922 5 Sheets-Sheet 1 (KM/4W Chrome I Sept. 11, 1923.

J. HENRJTZI ROTARY ROCK DRILL Filed Jan. 17 1922 3 Sheets-Sheet 5 W El 112 Patented Sept. 11, 1923.

UNITED STATES JOSEPH HENRITZI, or SPOKANE, WASHINGTON.

ROTARY ROCK DRILL.

Application filed January 17, 1922. Serial No. 529,820.

To all whom it may concern Be it known that I, JosnrH HENRITZI, a citizen of the United States of America, residing at Spokane, Spokane County,

5 State of lVashington, have invented new and useful Improvements in Rotary Rock Drills, of which the following is a specification.

This invention relates to rotary rock 1 drills, and has for its purpose to provide a bit of the character mentioned that can be constructed and suspended in such a manner that a hole of uniform diameter can be drilled into the earth to a great 1 depth and cased, instead of being compelled to periodically cut down the diameter of the hole. V,

This avoids the drilling of an unnecessary amount of earth and rock and the use of unnecessarily large pipe at the opening and at the same time assures the fact of.

a hole of suflicient diameter at the terminal or bottom of the hole, I

Means are provided for contracting the bits so that they can be passed through the pipe and expanded, when reaching a point below the pipe, so that a hole of sufiicientdiameter to receive the pipe can be drilled and the pipe lowered from time 8 to time as the holeis drilled and the bits contracted from time to time for withdrawal through the pipe.

The invention will be hereinafter particularly described, pointed out in the claims and illustrated in the accompanying drawings, in which Figure 1 isfa diagrammatic'view of a drill installed for operation, embodying my invention, showing a derrick, connecting parts, means for the rotation of the drill and a sectional view of the pipe and of the earth in which the drill is to operate. Figure 2 is an enlarged broken-away elevation of a drill pipe embodyingmy invention, a portion of the internal construction beingshown in dotted lines, the bit being shown in an expanded position, Figure 3 isa viewsimilar to Fig ure 2 but with the bit in a contracted position, Figure 4 is a viewsimilar to Figure 3 with the dotted lines omitted and showing a'differentview of the bits, Figure 5is an enlarged sectional view taken on the line 5-5 of Figure 4, F igure6 is a sectional View taken on the line 66 of Figure 5, Figure 7 is a sectional view taken on the line 7-7 of Figure 5, Figure 8 is a sectional view taken on the line 8-8 ofFigure 3, Figure 9 is a sectional view taken on the line 9 9 of Figure 2, Figure 10 is anenlarged broken-away view of the upper portion of the. drill pipe, the. internal construction being shown in dotted lines, Figure 11 is a sectional view taken on the line 1 1-11 of Figure 10, Figure 12 is a view similar to Figure 11,. showing thejoints of the drill pipe disconnected but in process of being connected, and Figure 13 is ,-a sectional view taken on the line 13-13 of Figure 12.

In a detail description in which like nu,- merals refer to like parts throughout the several views, I have shown a drill pipe 10, Figures 5, 7 and 8, with oppositely disposed walls 11 thickened for some distance up from the bottom, as shown in Figures 6 and 7, at the bottom of which are angular shafts 12, upon which are rotatably mounted, cone bits 13. Extending across thepipe 10 ,a short distance above the thickened portions 11, is a plate 14, secured to the wall of the pipe 10 by means of lugs 15, bolted to the wall as shown in Figure 8 The plate 14 supports an oil tank 16, used as a storage for oil for lubricating purposes,

nut 17 threaded over the tank 16 rests against ,the upper side of the plate, 14. Openings 18 longitudinally arranged through the thickened walls 11 extend to the shafts 12 and are connected at their upper ends with tubes 19 reaching to the in terior of the tank 16. Mounted in the lower end of the pipe 10, oppositely disposed and' between the thickened walls 11, are two jaws 20 and 21, having beveled surfaces 22, the two being hinged together on the shaft 23 extending. transversely through the thickened walls 11.

The lower ends of the jaws 20 and 21 are formed into angular shafts 24 and 25 .respectively and on these shafts are. rotatably mounted, cone bits 26 and 27 respectively. Longitudinal openings 28 are made through the jaws 20 and 21, which reach to the shafts 24 and 25 and to theupper ends of the openings 28 are attached fie ible tubes 29, which connect with the in terior ofthe tank 16. The shafts 12 are lubricated from the tank 16 through .the tubes 19 and the shafts 24 and 25 are lubricated from the tank 16 through the tubes 29. Holes 30 are made through the plate 14 and grooves 31 longitudinally through and 21.

The rods are brought together at 38, Figure 2 and formed into a link 39 in which is mounted a ring 40 to which is attached a cable 41. The cable 41 together with intervening links 42, Figures 11 and 12 connect with a rod 41 at a joint 41, which rod reaches to and through the top 43 of the pipe 10. The sections of the cable 41 and the links 42 are connected by means of interlocking loops 44 and holes 44.

As additional pipe 10 is needed for the deepening hole being drilled into the earth, sections of pipe of such length as the height of the derrick 45 will permit being joined with the pipe 10 already in use, are formed and across each one is placed a bracket 46 near the lower end thereof and a bracket 47 near the top thereof. The pipe portions are joined together by a threaded conneo tion 48, the manner of forming the connection being shown. in Figure 12, whereby a threaded portion 49 projects from one of the links 42 and is turned into a threaded opening 50 in the link at the top of the section of the pipe below and in the rotation of the pipe 10 the parts are brought together to the position shown in Figure 11. While the connection is being made, the cable 41 and links 42 are held in position in the lower portion by means of a pin 51 passed through the links 42 and through the pipe 10 as shown in Figures 12 and 13. lVhen the thread 52 on the upper section 10 of the pipe 10 has sufficiently engaged the thread 48 on the section 10, Figure 412, to hold the weight of the pipe 10, the pin 51 is manually withdrawn and the section 10 rotated until the connection is made complete and firm. A pulley suspended within the derrick 45, Figure 1, carries a hook 54, which engages a loop 55 connected with an annular ring 56, Figure 11, encircling the upper portion of the pipe 10 beneath an annular flange 57 on the pipe 1.0.

The lower portion of the rod 41 is squared for a distance at 58, such squared portion being engaged by a square opening 59 through a bracket 60 extending across the pipe 10. Through the top 43 of the pipe 10 is an opening 61 in which is threaded a cap 62 having an opening 63 therethrough,

wardly above the cap 62 engaging the rod 41 and above the saine'a nut 65 engages the threaded end 41 of the rod 41'.

The extension 64 is for the purpose of givin clearance for the rotation of the nut 65. Klso through the top 43 of the pipe 10 is an opening 66 in which is mounted a swivel 67 with an opening 68 therethrough. To the swivel 67 is connected a hose 69 leading to a source of water supply for moistening purposes. The pipe 10 is rotated by a gear mechanism 70 conventionally shown.

Referring now to Figures 5 and 8, it will be seen that the bits 13 on the stationary shafts 1.2 precedethe bits 26 and 27 on the adjustable shafts 25 and drill the center of the hole in the earth. WVhen the drill pipe 10 is being inserted into the casing 71, the bits 27 are in the position shown in Figure 5 and after the same has reached a position where the said bits are belowthe lower end of the casin 71, the bits 26 and 27 are expanded to t e position shown in Figure 2. The expanding of said bits is accomplished as follows. The nut 65, Figure 11 is turned on the rod end 41 to drop the cable 41 downwardly, which drops the rods 35 attached to the wedges 36, Figure 5, thereby causing the wedges 36 to drop by gravity back of the jaws 20 and 21 and between the same and the pipe 10, whereby the jaws 20 and 21 are forced together to the position shown in Figure 2, thereby bringing the bits 27 to the position there shown, causing the same to extend outwardly beyond the casing 71, thereby drilling a hole of sufficient diameter to permit the casing 71 to be lowered from time to time to a position a short distance above the drills. When it is desired to elevate the drill, the bits 27 are contracted again to the position shown in Figure 5, by turning the nut 65, Figure 11 on the rod end 41 to elevate the wedges 36 to the position shown in Figure 5, whereby by gravity the jaws 20 and 21 and the bits 27 are brought to the position shown in Figure 5. Lugs 72 on the inside of the pipe 10 serve as stops for the wedges 36 when they are elevated to a sufficient heightto permit of the change of the position of the jaws 20 and 21 and the bits 27 as above described. The square opening 59 throughthe bracket 60 engaging the squared portion 58 of the cable 41 prevents the twisting of the cable 41 in the turning of the nut 65. The blades 27 a and 27 b respectively on the bits 26 and 27 are formed at opposite angles in order to form a better cutting surface.

What is claimed is:

1. A rotary rock drill comprising two sets of cone bits mounted in a drill pipe and adapted to rotate therewith, one set of said bits mounted above the other, the lower set being rotatably mounted on the lower end of the drill pipe and adapted to drill the smaller hole and the upper set rotatably mounted on the lower ends of a pair of roekable jaws adapted to drill such hole larger.

2. A rotary rock drill comprising two sets of cone bits mounted in a drill pipe and adapted to rotate therewith, one set of said bits mounted above the other, the lower set being rotatably mounted on the lower end of the drill pipe and adapted to drill the smaller hole and the upper set rotatably mounted on the lower ends of a pair of rookable jaws adapted to drill said hole larger, the lower set of said bits being set to permanent position and the higher set being adapted for lateral adjustment.

3. A rotary rock drill comprising two sets of COne bits mounted in a drill pipe and adapted to rotate therewith, one set of said bits mounted above the other, the lower set being rotatably mounted on the lower end of the drill pipe and adapted to drill the smaller hole and the upper set rotatably mounted on the lower ends of a pair of rockable jaws adapted to drill such hole larger, the lower set of said bits being set to permanant position and the higher set being adapted for lateral adjustment by manually operative means.

In testimony whereof, I aifix my signature,

JOSEPH HENRITZI. 

